package com.mmall.concurrence.example;

import com.mmall.concurrence.annoations.ThreadSafe;
import lombok.Getter;
import lombok.extern.slf4j.Slf4j;

import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;

@Slf4j
@ThreadSafe
public class AtomicExample5 {

    private static AtomicIntegerFieldUpdater<AtomicExample5> updater = AtomicIntegerFieldUpdater.newUpdater(AtomicExample5.class,"count");
    //必须用volatile修饰
    @Getter
    private volatile int count=100;

    private static AtomicExample5 example5 = new AtomicExample5();

    public static void main(String[] args) {

        if(updater.compareAndSet(example5,100,120)){
            log.info("update success,{}",example5.getCount());
        }
    }

}
